css-analysis.php

<table><?php
$css_file = 'foo/bar.css';
$css = file_get_contents($css_file);

preg_match_all('/([a-zA-Z-]+)\:(.+)\;/', $css, $matches);

$totals = array();

foreach ($matches[0] as $match)
{
  if (!isset($totals[$match])) $totals[$match] = 0;

	$totals[$match]++;
}

arsort($totals);

foreach ($totals as $key => $count)
{
	echo '<tr>';
	echo '<td>' . $key .'</td>';
	echo '<td>' . $count .'</td>';
	echo '</tr>';
}
?>
</table>